Valve



NOV. 20, 1945. V. CREVA'l-:N E 'TAL 2,389,297

VALVE Filed Aug. 25, 1945 2 ShaeLS-Sheei'l 2 Q 3a' 4o PE' 14' s2 f f 3') www O 82 /4 F w IO?. 35 g W 9o 3@ 37 36 a@ L 93 3Q 59 r Y "I8 i l I .to P-IIELE. FfEvEl. Eh.

m2. 3% in 401 d f" www Patented Nov. 20, 1945 Vasco Crevatin,Gilio Crevatn, YWaldema'r.

Crevatin, and Mario Crevatin,` Sao Paulo,

Brazil Application August 25, 1943, serial lm aisacxiol 3 Claims.

This invention relates to valves and more particularly to screw-actuated plug valves. Y Y

An important object of the invention is to provide a valve, free of the usual packing or stuffing box about the valve stem, free of leakages at the juncture of the bonnet and exterior portion of the actuating means and free of projections, other than an actuating handle, which handle forms an integral part of the valve hous- 111g.

e Another important object is to provide a valve wherein temporary vacuums are not created, which vacuums may result in' the slow drip of water after a valve is closed.

Still another object is to provide avalve ony reciprocating the valve element, the latter being free of attachment tqthis means, but carried thereby,

Yet another object is to provide 'valve elements of various forms adapted for use in this novel valve. Y

Other objects and advantages of this invention will be apparent during the course ofthe following detailed description, taken in connection with the accompanying drawings and in which drawings:

Figure 1 is a sidel elevation of the novel valve. Figure 2 is a front elevation thereof.. Figure 3 is top plan thereof.

Figure 1 is an enlarged vertical longitudinal section of the novel valve, closed. Y

Figure 5 is a top plan of a valve se'at, A Figure 6 is a top plan of a means for retaining the valve seat of Figure 5.

Figure 'l is an elevation and Figure 8 a top plan of a stationary body cooperating with the movable portions of the valve actuating means. Figure 9 is a top plan of a washer, associated with the body of Figures '7 and 8.

Figure l0 is a side elevation, Figure 11 a top plan and Figure 12 a vertical section of a movable portion of the valve actuating means.

Figure 13 is a perspective view of a iiowbreaker which may be employed.

Figure 14 is a vertical longitudinal section,

l somewhat similar to Figure 4 but showing the lvalve open and a modified form of a movable modified'forms of valve elements which may .be

employed in this novel valve.

Figure 18 is a top plan of the valve element of Figure 17.

Figure 20 is a view partly in vertical section of the valve element ofFigure 19.

Figure 22' is a -vi'ew partly in .vertical section of the valve element of Figure 21, and Figure 23 is a top plan thereof. Y

Figure 25 is a View partly 'in vertical section of the valve velement of Figure 24, and Figure 26 is a topplan thereof.

In the drawings, wherein for the purpose of illustration are shown preferred and modified forms of the invention, the letter A may designate the valve housing; B'the valve seat; C valve actuating means including the means shown in Figures 1, 10, 11 and 12; D modied valve actuating means of Figures 14, 15 and 16; E, F, G, H, K,`L and M valve elements.

The valve housing A includes an upper stationary housing portion 30, from which may extend a hollow stem 3| for attachment, as by the nscrew threads 32 at one end, to a suitable'source of liquid supply. There is a liquid inlet 33 between the portion and stem 3i and its axis may be normal to the major axis of the portion 30. The' chamber 34 Within the portion 30 is provided with Va downwardly facing substantially V-shaped, circular groove 35 for retaining the valve seat B against'vertical movement, as is apparent in Figure 4, and. there is provided a second downwardly opening circular groove 35 which is formed between an outer depending skirt `3l of the portion 30 and a depending cylindrical section 38 ofthe portion 30, spaced inportion of valve actuating means, differingfrom wardlyof the skirt 31.- This groove 36 is quite deep, as is apparent in Figures 4 and14, and its purpose will be subsequently explained. kFrom its lower end upwardly for a short distance, the interior face of the cylindrical section'38 is provided with screw threads 39. Preferably, lthe skirt 31 is shorter than the section l38. If desired, a depending spring-retaining boss 40 may project from the uppermost wal1 of the portion 30 with its axis aligning with the major axis of the portion 30.

This valve housing A also includes a lower movable housing portion or bonnet 45, This portion 45 is adapted to rotaterand to move, when rotated, either upwardly orfdownwardly (i. e. the lower portion 45 telescopes with the upper portion 30). VThe upper end ofthe lower movable portion 45 comprises a cylindrical extension 46 which tsinto the groove 36 andthe t is, pref.-

erably, not a tight one. It will be noted that the upper end of the extension 4S does not touch the bottom or base of the groove 36. Below this extension 45, the wall of the housing portion 45 tapers downwardly and inwardly to form a nozzie 41, providing a liquid outlet, but this outlet is subordinate to the main liquid outlet later described., .Above .the subordinate outlet one or more recesses 48 may be providedinthe wall of the portion 45 for a Apurpose later described. Otherwise, this wall is provided with interior screw threads 49 for association with a valve ele- 1 .which limits upward movement of the carrier 10.

ment support means next to be described.

The `valve element supportrneans yincludes a tubular member 50 comprising an .upper tube section and lower tube section 52. In both'forms shown in Figures 4, 10, 11 and 12, as well as Figures 14, 15 and 16, this means''50 has inthe upper section 5| a substantially at top surface .53, affording a face-to-face contact with the bottom of the valve element'hiead, with a circular opening 54 communicating with thepassageway 55 through the .section 5| and one or more circular openings 56 are provided in the side Walls of the section 5|, preferably `just below the top surface 53 for the passage orliquid, into the passageway when the valve open. The-lower tube section 52 has a passageway 51 in communication with a passageway 55, a liquid outlet or opening 58 at its lower end,V which outlet is the main outlet of the valve, .and is exteriorly screw threaded, at its upper end, preferably with a square thread, as,v at 59; Below this thread, the periphery of the section 52 is smooth as at E0 and` below this smooth face, there is a screw threaded portion, as at 6| which ends short of theiower end 620i section 52, which end. 52 yis of reduced circumference and smooth. 'While the form shown in Figures 4, 10, 1l and l2ris of one-piece construction, the form shown in Figures 14, l5gand 16 is desirable where adjustment ofthe length of the tubular `member isimportant. In this modication, the Vupper tube section is longer and indicated as B3,

is adapted for separation from the lower tube section, indicated as 64, has vexterior screw threads 55.-,and may have aligning screw driverv slots 56 at its lower end. The ,only change in the lower tube section 541s theprovision of interior screw threads 61, cooperating withthe screwthreads 65 so that by inserting the section 63 into the top 5B of the section 64, and rotating it to the desired height, itmay be substituted for the one-piece tubular member 50.. The modified form of Figures 14, 15 andA 16, together with the lower movable housing portion 45, constitute the modified valve actuating means D, while the .form of Figures 4, 10, 11 and l2, together lwith the lower movable housing portion 45, constitute, of course, the valve actuating means C. l

By inserting either tubular member into the -lower movable housing portion 45, the interior `able housing portion'45 (since the latter is secured ,to the tubular member, as has just been detailed) and, in addition, functions as a support for the valve seat,to be described. The carrier 'has an upwardly directed collar 1|, exteriorltr screw threaded-as at 'l2 for v,cooperation with the '20 circular groove 36.

screw threads 39 of the cylindrical section 38 of the upper housing portion 30, whereby this portion 30 supports the carrier 'I0 in a depending position. The upper end of the collar I, provides a 5 dat surface 73 and at the base of the interior surface of the collar, there is a shoulder 14, below which is an opening through the collar to its lower end '|5 lwhichopening isprovided with a square screwthread 'I5 for cooperation with the similar 10 vthread 59 of the tubular member 50. There is also provided an exterior shoulder 7'! adapted to abut the lower end of the cylindrical section 38,

v When the carrier 70 is coupled to the upper housing portionand the tubular member 50, connected to thelower housing portion 45, is joined to the carrierv 19, as explained, the valve housing appearsas in Figures l, 2, 4 and 14, with the upperend of the cylindrical extension 46 within the It will be noted, in Figures 4 and 14,- that thereis a space 'I8 between the .carrier 'l0 vamid-,he lower housing portion 45,.with the loose tof the'cylindrical extension 4B Within Athe'groove 3S and` this space -I8, there is com- .munication togthe atmosphere from the interior fof the, valve ,housing A, 'so that there willnot be apt to be,` condensation upon the housing A.k In order to'assistin rotating the lower housing portion 45,;a` suitable laterally extending handle |9 may be attached thereto or be an integral part tl'lelfeof.` This is the only' projection from the housing and thereV are; also no projecting nuts, screw lbeads or the like,

Disposed upon theshoulder 14 of the carrier 10 is asuitable washer, shown in Figure 9, en-

circling the ,tubular member 50 and a suitablejow breaker 8| may be inserted into the lower end 62 of the tubular member5ll.4 A suitable resilient means, such as an expansion coil spring 82 may be 4,0 provided'wi th one end abutting the valve housing about theboss 49 and its other end bearing upon the valve element, as will be described.

`As, forthevalve .seat B, shown particularly in Figure, this may be of Vsuitable packing material and presents an inverted truncated conical Valve seating surface 98. The outer'cylindrical surface 9|v of the seat abuts the inner surface of the cylindrical section 38 above vthe screw threads 39 Vand extends vup to and into the inverted V-shaped groove 35, as in Figures 4 and 14. There is, of course, the -usual opening 92 through the seat. A suitable-seat carrier for thev seat may be provided, shown in Figure 6, comprising a disc 93 with a ,central opening 94 and a collar S15-about the opening. The seat rests upon this seat carrier withthetrunoated conical seating surface 90 trending upwardly andoutwardly therefrom. The seat carrier rests upon' the shoulder.v 1410i the carrier 'l0 and it will be Ynoted that there Yis a space 96 between `the Washer 80 and the seat carrier. y Y Y v `Any one of the valve elements E, F,.G, H, K, L and M may `be employed with this novel valve structure. Each comprises-a head Hill and depending stein `lill withV the 4head provided with a boss |92 encircled by the lower end of the spring 82, and eachY has a attened lowersurface |03 about the stem lill. The heads |09 may have solid upper faces as illustrated in Figures 14, 19 and 20, or, the heads maybe dished, as shown in Figures 18,y Y22 and 25.` In Figure 2D it,will be noted vthat the stem 19| is detachable .fromrthe headV illfand the boss-|05 isa reduced, projecting end of the stem` The stems |01 Yarewoi less circumference than that of 'the `opening 54 atthe upper end of the tubular member B and, of course, also less than that of the passageways 55 and 51.

Water will not collect in the space 18 and overflow from the upper end of the lower movable housing portion 45 since it will iind its way into the recesses 48 and finally flow out of the subordinate opening between the wall vof the end 62 of the tube section 52 and that of the nozzle 41.

Upon inserting the spring B2 and a valve element into the stationary housing portion 30, the seat B and its carrier may next be inserted followedby the carrier and washer 80, which former is coupled to the housing portion as has been described, with the valve stem 19| extending through the center of the carrier 10. Then the valve actuating means C or D may be attached as has been described.

By grasping the handle 19 and moving it in an arc, the movable housing portion 45 will rotate and, because of its attachment to the tubular member 50, and the screw threaded attachment of the latter with the carrier 10, will rise. This will cause the valve element to rise and open, and liquid will flow past the seat 90, through the openings 56, through the passageways 55 and 51 and out the outlet 58. Of course, rotation of the movable housing portion 45 in the opposite direction will cause the valve element to fall and close the valve.

Various changes may be made to the forms of the invention herein illustrated and described without departing from the spirit of the invention or scope of the following claims.

What is claimed is:

1. In a valve, a valve element including a valve head and a depending valve stem, a housing including an upper stationary portion provided with a downwardly-opening circular groove; means for actuating the Valve element, including a rotatable housing portion, having an open lower end, an upper cylindrical extension disposed within said groove, spaced from the side walls thereof, and spaced from the bottom of said groove when the valve is closed, and a hollow valve element support extending upwardly through and secured to said rotatable housing portion, with the head of said valve element disposed upon the upper end of said support and said stem extending into the hollow of said support and free of attachment with and spaced from said support, said support having exterior screw threads an upper opening in communication with the interior of said upper housing, when said valve is open, and a lower opening into said open lower end; a depending, hollow stationary carrier secured to said upper stationary housing, disposed within and spaced from the walls of said rotatable housing and provided with interior screw threads, cooperating with said first-named screw threads, and a valve seat supported upon the upper end of said carrier and provided with a bevelled valve head-receiving face.

2. In a valve, a valve element, having a head and stem; a housing comprising a stationary portion having a water inlet, and a rotatable and vertically movable portion having a water outlet, with said portions disposed in telescoping relation; a valve element support carried by said second-named portion, comprising a tube extending through said second-named portion and in communication with said outlet at al1 times and with said inlet when said valve is open, said tube having exterior screw threads and an upper face upon which said valve head is disposed, and also provided with an opening accommodating said valve stem; a depending stationary carrier carried by said stationary housing portion and extending into said movable housing portion, spaced from the walls of the latter throughout its length, provided with interior screw threads cooperating with said exterior screw threads of said tube; and a valveseat carried by said carrier, said valve element |being free of attachment to said tube.

3. In a support means for a reciprocating valve element, said element having a head and a depending stem with the stem free of attachment to said support and adapted to be disposed within a valve housing having interior screw threads, said support means including a tubular body having a substantially flat face at its upper end 'adapted to support said head, said body provided with a perforation, less in circumference than the inner circumference of said tubular body and greater in circumference than the circumference of said stem, and a perforation in its vertical wall adjacent said first perforation, said tubular body having exterior screw threads cooperating with the interior screw threads of said housing.

VASCO CREVATIN. GILIO CREVATIN. WALDEMAR CREVATIN. MARIO CREVATIN. 

